Looking relaxed and happy, the soon-to-be parents were photographed walking in the South of France on Friday, Aug. 23. The expectant mother -- due in February -- held onto Cowell's arm and later stopped to take photos of the British TV star sitting in a race car.

The pregnant socialite wore sunglasses and a loose-fitted blue and purple sundress for the outing, with the wind at one moment accidentally exposing her bare belly bump and underwear.

Lauren Silverman's growing baby bump can clearly be seen as she stood at the side of the Go-Karting track taking snaps of Simon Cowell enjoying a few laps around the circuit in the South of France.Credit: FameFlynet, Inc

"Lauren has loved Simon forever," a source previously told Us. "And they started having an affair four years ago." Though it started as just a fling, the relationship became more serious once Silverman became pregnant. "Simon and Lauren are together," a Silverman family source said. "They talk 100 times a day."

Silverman and her estranged husband Andrew Silvermanrecently settled their divorce on Aug. 14 after more than 10 years of marriage. The former couple will continue to have joint custody over their 7-year-old son Adam.